SKU: HRC98515
UPC: 840793125739
MPN: 98515
The HOWARDS RACING COMPONENTS Single Valve Springs - 1.510 OD (SKU HRC98515) are precision-engineered racing valve springs designed for high-performance engine builds requiring consistent spring rate and reliable valve control. These single springs deliver a 350 lb/in spring rate, making them suitable for naturally aspirated and moderately boosted applications where maintaining proper valve seating and lift characteristics is critical to engine longevity and performance.
With a 1.510-inch outer diameter and 1.300-inch coil bind specification, these springs are engineered to work within tight clearance parameters typical of modern racing cylinder heads. The 350 lb/in spring rate is matched to valvetrain components that require positive closure without excessive preload, reducing fatigue and extending component life. HOWARDS RACING COMPONENTS maintains tight tolerances across the spring set of 16, ensuring consistent performance across all valve events and minimizing harmonics that can lead to valve float at elevated RPM.
These springs are essential for engine builders, racing shops, and serious enthusiasts developing competition engines where valvetrain stability directly impacts horsepower delivery and reliability. Whether building a street performance engine or track-focused platform, proper spring selection prevents catastrophic failure from valve float, which occurs when spring rate cannot control valve acceleration at high RPM. The 1.510 OD configuration fits standard SB Chevy, SB Ford, and similar small-block platforms commonly modified for racing applications.
Racing valve springs must complement camshaft lift, duration, and lobe separation angle to create a cohesive valvetrain system. Undersized springs invite valve float and bent pushrods; oversized springs accelerate component wear and waste horsepower. HOWARDS RACING COMPONENTS' 350 lb/in option bridges the gap for moderately aggressive profiles, making it a practical choice for builds aiming at 6,000–7,500 RPM capability with reliability.
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